Find the best open-source alternatives

A free, open-source, cross-platform archive manager and file utility supporting 200+ archive formats.

A free marketplace for CC0-licensed 3D assets, models, textures, and HDRI files ready for use in Three.js and React Three Fiber projects.

A lightweight and extensible infrastructure for building high-quality web applications based on ASP.NET Core.

A JavaScript library for managing tournament brackets (round-robin, single/double elimination) with full logic and storage abstraction.

An open-source authentication and user management solution with passkeys, MFA, OAuth SSO, and SAML support.

An open-source ticket selling and event management platform built on Laravel, enabling organizers to avoid third-party fees.

A scalable, distributed MQTT broker written in Rust, designed for high-concurrency IoT and M2M applications.

A dynamic stylesheet language that extends CSS with variables, mixins, functions, and more.

A Go library implementing collaborative filtering algorithms for recommendation systems, including ALS, Bayesian, and similarity-based approaches.

A tiny DIY kit to set up vanilla Emacs for Common Lisp programming with SLIME, Paredit, and Rainbow Delimiters.

NoiseTorch is a real-time microphone noise suppression tool for Linux that creates a virtual microphone with filtered audio.

A Scala-based string templating engine with logic support, available as a library and command-line tool.

An Intrusion Prevention System (IPS) for SSH that blocks brute force attacks using iptables and optional nmap/dig probes.

A YAML-based language for designing and documenting HTTP-based RESTful APIs.

A scriptable HTTP service and asyncio driver for headless Chrome, compatible with the Splash API.

An auto-generated, fully type-safe database client for Go that reduces boilerplate.

An Android library for pull-based remote notifications using JSON files, as an alternative to Google GCM/Amazon SNS.

A free, open-source singing synthesis editor designed as a modern successor to UTAU for creating vocal tracks.

A highly customizable, powerful and easy-to-use alerting library for Android, built with Kotlin.

A powerful, interactive JavaScript charting and data visualization library for the browser.

A self-hosted music scrobble database for creating personal listening statistics and charts.

A sandbox framework for fast prototyping of tile-based games in HTML5 and JavaScript.

A modular web framework for V that emulates NestJS architecture, built as a wrapper around vweb.

Automatically build and rebuild Xcode image catalogs for iOS/macOS app icons and universal images from source assets.

A Wagtail add-on for managing scripts and tags with built-in cookie consent and GDPR compliance.

A browser-based music tracker that plays and edits Amiga MOD and FastTracker XM files using plain JavaScript.

A personal Dynamic DNS client that updates DNS records using Digital Ocean's DNS backend.

A Cloud Foundry buildpack for deploying Ruby, Sinatra, and Rails applications to the platform.

A general-purpose, web standards-based PDF viewer built with HTML5 and JavaScript.

A multi-line editor control for Lazarus with syntax highlighting, multi-carets, word-wrap, and a mini-map.

A WebSocket framework that enables real-time, reactive frontend-backend communication by syncing SQL queries and server-side data.

Open-source data integration platform for building ELT pipelines from APIs, databases, and files to data warehouses, lakes, and lakehouses.

A lightweight and fast JavaScript parser for TTF, OTF, TTC, and WOFF fonts with SVG and variable font support.

A delightfully simple 2D game engine for the D programming language, designed for fast and fun development.

A safe, customer-facing template engine for flexible web applications with beautiful markup.

A local development environment for creating prototypes with the deprecated Framer Library.